LMR14050SDDAR Simple Switcher Description


The LMR14050DDAR simple switcher is a 40 V, 5 A step-down regulator with a high-side MOSFET integrated. With a wide input range of 4 V to 40 V, it is suitable for power conditioning from unregulated sources in a variety of applications ranging from industrial to automotive. In Sleep mode, the regulator's quiescent current is 40 A, making it suitable for battery-powered systems. In shutdown mode, an ultra-low 1 A current can further extend battery life.
A wide adjustable switching frequency range allows for the optimization of either efficiency or external component size. Internal loop compensation relieves the user of the time-consuming task of designing loop compensation. This also reduces the device's external components. The LMR14050 also includes built-in safety features such as cycle-by-cycle current limitation, thermal sensing and shutdown due to excessive power dissipation, and output overvoltage protection.


LMR14050SDDAR Simple Switcher Features


4 V ~ 40 V Input Range
5 A Continuous Output Current
Ultra-low 40 μA Operating Quiescent Current
90 mΩ High-Side MOSFET
Minimum Switch-On Time: 75 ns
Current Mode Control
Adjustable Switching Frequency from 200 kHz to 2.5 MHz
Frequency Synchronization to External Clock
Internal Compensation for Ease of Use
High Duty Cycle Operation Supported
Precision Enable Input
1 μA Shutdown Current
External Soft-start
Thermal, Overvoltage and Short Protection


LMR14050SDDAR Simple Switcher Applications


Automotive Battery Regulation
Industrial Power Supplies
Telecom and Datacom Systems
Battery Powered System